Section 303(d) of the federal Clean Water Act (CWA) and the U.S. Environmental Agencys (EPA) implementing regulations direct each state to identify and list waters, known as water quality limited segments (WQLSs), in which current required controls of a specified substance are inadequate to achieve water quality standards. For each WQLS, the State is to either establish a Total Maximum Daily Load (TMDL) of the specified substance that the waterbody can receive without violating water quality standards, or demonstrate that water quality standards are being met. Piney Run Reservoir in the South Branch Patapsco River watershed (basin number 02-13-09-08) was identified on Marylands 1998 list of WQLSs as being impaired by sediments and nutrients. This report provides an analysis of monitoring data and reports, which shows that sedimentation is not a problem in Piney Run Reservoir. This analysis supports the conclusion that a TMDL for sediments is not necessary to achieve water quality standards in this case. Barring the receipt of any contradictory data, this report will be used to support the removal of the sediment listing of Piney Run Reservoir from Marylands list of WQLSs when MDE proposes a revision of the 303(d) list for public review in the future. Although Piney Run Reservoir does not display signs of sediment impairment, the State reserves the right to require additional pollution controls in the Piney Run Reservoir watershed if evidence suggests that sediments from the basin are contributing to downstream water quality problems. The nutrient impairment will be addressed separately.